Loans and Allowance (Commercial and Retail Credit Exposure Credit Risk Profile by Internal Rating) (Details) - USD ($) $ in Thousands	Mar. 31, 2018	Dec. 31, 2017	Mar. 31, 2017
Financing Receivable, Recorded Investment [Line Items]
Loans	$ 1,452,461	$ 1,186,713	$ 1,171,387
Commercial Real Estate [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans	490,885	318,684
Commercial Real Estate [Member] | Pass
Financing Receivable, Recorded Investment [Line Items]
Loans	472,398	309,451
Commercial Real Estate [Member] | Special Mention
Financing Receivable, Recorded Investment [Line Items]
Loans	10,996	4,219
Commercial Real Estate [Member] | Substandard
Financing Receivable, Recorded Investment [Line Items]
Loans	7,474	4,996
Commercial Real Estate [Member] | Doubtful
Financing Receivable, Recorded Investment [Line Items]
Loans	17	18
Commercial Segment [Member] | Pass
Financing Receivable, Recorded Investment [Line Items]
Loans	664,380	457,126
Commercial Segment [Member] | Special Mention
Financing Receivable, Recorded Investment [Line Items]
Loans	16,661	10,003
Commercial Segment [Member] | Substandard
Financing Receivable, Recorded Investment [Line Items]
Loans	14,992	10,780
Commercial Segment [Member] | Doubtful
Financing Receivable, Recorded Investment [Line Items]
Loans	17	18
Commercial Segment [Member] | Construction Loans [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans	52,889	28,164
Commercial Segment [Member] | Construction Loans [Member] | Pass
Financing Receivable, Recorded Investment [Line Items]
Loans	52,221	27,464
Commercial Segment [Member] | Construction Loans [Member] | Substandard
Financing Receivable, Recorded Investment [Line Items]
Loans	668	700
Commercial Segment [Member] | Commercial and Industrial [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans	152,276	131,079
Commercial Segment [Member] | Commercial and Industrial [Member] | Pass
Financing Receivable, Recorded Investment [Line Items]
Loans	139,761	120,211
Commercial Segment [Member] | Commercial and Industrial [Member] | Special Mention
Financing Receivable, Recorded Investment [Line Items]
Loans	5,665	5,784
Commercial Segment [Member] | Commercial and Industrial [Member] | Substandard
Financing Receivable, Recorded Investment [Line Items]
Loans	6,850	5,084
Consumer [Member] | Pass
Financing Receivable, Recorded Investment [Line Items]
Loans	749,913	702,990
Consumer [Member] | Substandard
Financing Receivable, Recorded Investment [Line Items]
Loans	6,498	5,796
Consumer [Member] | First Mortgage [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans	476,422	444,243
Consumer [Member] | First Mortgage [Member] | Pass
Financing Receivable, Recorded Investment [Line Items]
Loans	470,769	439,075
Consumer [Member] | First Mortgage [Member] | Substandard
Financing Receivable, Recorded Investment [Line Items]
Loans	5,653	5,168
Consumer [Member] | Second Mortgage [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans	75,942	69,477
Consumer [Member] | Second Mortgage [Member] | Pass
Financing Receivable, Recorded Investment [Line Items]
Loans	75,590	69,130
Consumer [Member] | Second Mortgage [Member] | Substandard
Financing Receivable, Recorded Investment [Line Items]
Loans	352	347
Consumer [Member] | Automobile Loan [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans	22,110	19,640
Consumer [Member] | Automobile Loan [Member] | Pass
Financing Receivable, Recorded Investment [Line Items]
Loans	22,085	19,616
Consumer [Member] | Automobile Loan [Member] | Substandard
Financing Receivable, Recorded Investment [Line Items]
Loans	25	24
Consumer [Member] | Boat/RVs [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans	175,747	169,238
Consumer [Member] | Boat/RVs [Member] | Pass
Financing Receivable, Recorded Investment [Line Items]
Loans	175,358	169,036
Consumer [Member] | Boat/RVs [Member] | Substandard
Financing Receivable, Recorded Investment [Line Items]
Loans	389	202
Consumer [Member] | Other [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans	6,190	6,188
Consumer [Member] | Other [Member] | Pass
Financing Receivable, Recorded Investment [Line Items]
Loans	6,111	6,133
Consumer [Member] | Other [Member] | Substandard
Financing Receivable, Recorded Investment [Line Items]
Loans	$ 79	$ 55